/// <inheritdoc />
public async Task <LockResult> LockAsync(ILock l, CancellationToken cancellationToken)
{
ActiveLock newActiveLock;
var destinationUrl = BuildUrl(l.Path);
using (var transaction = await BeginTransactionAsync(cancellationToken).ConfigureAwait(false))
{
var locks = await transaction.GetActiveLocksAsync(cancellationToken).ConfigureAwait(false);
var status = Find(locks, destinationUrl, l.Recursive, true);
var conflictingLocks = GetConflictingLocks(status, LockShareMode.Parse(l.ShareMode));
if (conflictingLocks.Count != 0)
{
if (_logger.IsEnabled(LogLevel.Information))
{
_logger.LogInformation($"Found conflicting locks for {l}: {string.Join(",", conflictingLocks.GetLocks().Select(x => x.ToString()))}");
}
return(new LockResult(conflictingLocks));
}
newActiveLock = new ActiveLock(l, _rounding.Round(_systemClock.UtcNow), _rounding.Round(l.Timeout));
await transaction.AddAsync(newActiveLock, cancellationToken).ConfigureAwait(false);
await transaction.CommitAsync(cancellationToken).ConfigureAwait(false);
}
OnLockAdded(newActiveLock);
_cleanupTask.Add(this, newActiveLock);
return(new LockResult(newActiveLock));
}
/// <summary>
/// Initializes a new instance of the <see cref="ActiveLock"/> class.
/// </summary>
/// <param name="l">The lock to create this active lock from</param>
/// <param name="issued">The date/time when this lock was issued</param>
/// <param name="timeout">Override the timeout from the original lock (to enforce rounding)</param>
internal ActiveLock([NotNull] ILock l, DateTime issued, TimeSpan timeout)
: this(
l.Path,
l.Href,
l.Recursive,
l.GetOwner(),
LockAccessType.Parse(l.AccessType),
LockShareMode.Parse(l.ShareMode),
timeout,
issued,
null)
{
}
private static ActiveLock Refresh(IActiveLock activeLock, DateTime lastRefresh, TimeSpan timeout)
{
return(new ActiveLock(
activeLock.Path,
activeLock.Href,
activeLock.Recursive,
activeLock.GetOwner(),
LockAccessType.Parse(activeLock.AccessType),
LockShareMode.Parse(activeLock.ShareMode),
timeout,
activeLock.Issued,
lastRefresh,
activeLock.StateToken));
}
/// <summary>
/// Creates an <see cref="XElement"/> for a <see cref="IActiveLock"/>
/// </summary>
/// <param name="l">The active lock to create the <see cref="XElement"/> for</param>
/// <param name="omitOwner">Should the owner be omitted?</param>
/// <param name="omitToken">Should the lock state token be omitted?</param>
/// <returns>The newly created <see cref="XElement"/> for the active lock</returns>
public static XElement ToXElement(this IActiveLock l, bool omitOwner = false, bool omitToken = false)
{
var timeout = l.Timeout == TimeoutHeader.Infinite ? "Infinite" : $"Second-{l.Timeout.TotalSeconds:F0}";
var depth = l.Recursive ? DepthHeader.Infinity : DepthHeader.Zero;
var lockScope = LockShareMode.Parse(l.ShareMode);
var lockType = LockAccessType.Parse(l.AccessType);
var owner = l.GetOwner();
var result = new XElement(
WebDavXml.Dav + "activelock",
new XElement(
WebDavXml.Dav + "lockscope",
new XElement(lockScope.Name)),
new XElement(
WebDavXml.Dav + "locktype",
new XElement(lockType.Name)),
new XElement(
WebDavXml.Dav + "depth",
depth.Value));
if (owner != null && !omitOwner)
{
result.Add(owner);
}
result.Add(
new XElement(
WebDavXml.Dav + "timeout",
timeout));
if (!omitToken)
{
result.Add(
new XElement(
WebDavXml.Dav + "locktoken",
new XElement(WebDavXml.Dav + "href", l.StateToken)));
}
result.Add(
new XElement(
WebDavXml.Dav + "lockroot",
new XElement(WebDavXml.Dav + "href", l.Href)));
return(result);
}
private static LockStatus GetConflictingLocks(LockStatus affactingLocks, LockShareMode shareMode)
{
if (shareMode == LockShareMode.Exclusive)
{
return(affactingLocks);
}
return(new LockStatus(
affactingLocks
.ReferenceLocks
.Where(x => LockShareMode.Parse(x.ShareMode) == LockShareMode.Exclusive)
.ToList(),
affactingLocks
.ParentLocks
.Where(x => LockShareMode.Parse(x.ShareMode) == LockShareMode.Exclusive)
.ToList(),
affactingLocks
.ChildLocks
.Where(x => LockShareMode.Parse(x.ShareMode) == LockShareMode.Exclusive)
.ToList()));
}